JP7417065B2 - heat treatment system - Google Patents

Description

TECHNICAL FIELD The present invention relates to a measuring device for checking the packaging of objects to be processed, and a heat treatment system equipped with the device.

Most iron parts are cleaned to remove dirt adhering to the surface of the part after forging or casting, and then subjected to heat treatment such as quenching or annealing (see Patent Documents 1 and 2). Among these, when performing a quenching treatment, the heated parts are instantly cooled in a quenching tank filled with a refrigerant such as oil or water. At this time, the cooling process using the refrigerant is performed by immersing many parts at once into the refrigerant in the tank.

Therefore, since the contact time with the refrigerant differs depending on the installation location of the component in the tank, the cooling rate also varies between individual components. As a result, the state of contact between the refrigerant and the parts is greatly influenced by the installation location of the parts in the tank, in other words, the size of the parts during cooling, the installation form, the number of parts, etc.

The installation form of parts during cooling after quenching is often the same as the parts used in the previous cleaning process. In other words, by knowing the size and number of parts in the cleaning process, the installation form of the parts can be determined, and the cooling effect during the quenching process, which is a subsequent process, can be approximately estimated.

Japanese Patent Application Publication No. 6-57468 Japanese Patent Application Publication No. 2000-167498

However, although the material, total weight, and individual size and shape of the parts to be hardened can be ascertained during the cleaning process, which is the previous process, even if the number of parts is the same, the manner in which each part is loaded, that is, the way it is packed, is determined for each process. may differ. For example, FIGS. 3 to 6 show installation configurations in which the same number of parts W are loaded in the same cleaning chamber 2 in different packaging styles. As shown in FIGS. 3 to 6, the total number of workpieces W loaded in the cleaning chamber 2 is 36, but the number of workpieces W loaded in the cleaning chamber 2 is 36. When the number of objects W to be processed differs, the manner in which the objects W to be processed are loaded as a whole also changes.

In other words, in the parts cleaning process and subsequent quenching process, if the packaging of the parts differs for each process, the cooling effect after the quenching process will also vary greatly depending on the process, even if the material and quantity of the parts are the same.

Therefore, the present invention makes it possible to suppress variations in the cooling effect during the post-process quenching process by accurately measuring the installation mode (packing style) such as the size and quantity of the objects to be processed in a processing chamber such as a cleaning device. An object of the present invention is to provide a device for measuring the packaging of a workpiece and a heat treatment system including the device.

The device for measuring the packing form of a processed object according to the present invention is a liquid level measuring device that measures the distance to a liquid level in a container (cleaning chamber) in which a processed object is installed when installed in a cleaning device equipped with a cleaning chamber. A detection unit, a reception unit that collects information about the distance measured by the liquid level detection unit, a calculation unit that calculates a change in distance to the liquid level over time based on information about the measured distance collected by the reception unit, and the calculation unit. The configuration includes a determination section that determines the state of the packaging of the object to be processed based on the results of calculations performed in the section.

The liquid level detection unit may be any liquid level detection device that detects changes in the liquid level using any one of infrared rays, ultrasonic waves, LEDs, lasers, and floats. Further, it is also possible to provide a heat treatment system comprising a vacuum degreasing cleaning device equipped with this package shape measuring device and a heat treatment device equipped with an oil bath for hardening the object to be treated.

The package shape measuring device of the present invention measures, for example, changes in the level of cleaning liquid in a cleaning chamber of a cleaning device at predetermined time intervals using a liquid level sensor or the like, and calculates the changes in the liquid level over time. It is possible to accurately grasp the cross-sectional change in the height direction in the cleaning chamber from the calculated change in the liquid level over time, and to estimate the manner in which the objects to be treated are installed. Utilizing the results, it is possible to suppress variations in the cooling effect between products in the quenching process, which is a post-process.

Furthermore, regarding the invention of a heat treatment system composed of a vacuum degreasing cleaning device having a packaging shape measuring device and a heat treatment device having an oil tank, information regarding the packaging shape of the processed material measured using the packaging shape measuring device is transmitted in a subsequent process. Since it can be reflected in the processing conditions during a certain hardening process, it is possible to always perform a uniform hardening process on the workpiece regardless of the skill of the operator.

1 is a schematic cross-sectional view of a vacuum degreasing and cleaning apparatus 1 having a package shape measuring device 10 of the present invention. 2 is a sectional view taken along the line XX shown in FIG. 1. FIG. FIG. 2 is a schematic diagram showing a loading state (first form) of objects W to be processed. It is a schematic diagram which shows the loading state (2nd form) of the to-be-processed object W. It is a schematic diagram which shows the loading state (3rd form) of the to-be-processed object W. It is a schematic diagram which shows the loading state (4th form) of the to-be-processed object W.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the apparatus for measuring the packing form of a processed object according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing an embodiment in which a packaging measuring device 10 of the present invention is installed in a vacuum degreasing and cleaning apparatus 1, and FIG. 2 is a cross-sectional view taken along the line XX of the vacuum degreasing and cleaning apparatus 1 shown in FIG. It is. The vacuum degreasing and cleaning apparatus 1 shown in FIG. 1 includes a cleaning chamber 2 that cleans a large number of workpieces W inside, a pipe P1 that supplies a cleaning liquid L to the cleaning chamber 2, and a pipe P1 that discharges the cleaning liquid L in the cleaning chamber 2 to the outside. A valve V that can freely adjust the amount of cleaning liquid L discharged from the pipe P2, a vacuum pump (not shown) that creates a reduced pressure atmosphere in the cleaning chamber 2, and the like are provided.

In this embodiment, a liquid level detecting section 11 that constitutes a part of the package shape measuring device 10 is installed above the cleaning chamber 2 as shown in FIGS. 1 and 2. The liquid level detection unit 11 detects the liquid level LS of the cleaning liquid L in the cleaning chamber 2, and instantaneously measures the distance between the liquid level detection unit 11 and the liquid level LS.

Further, as shown in FIG. 2, the liquid level detection section 11 is connected to a reception section 12, a calculation section 13, and a determination section 14 via wired or wireless electrical communication means outside the cleaning chamber 10, and these parts are connected as a set. A package shape measuring device 10 is formed.

When the liquid level detection unit 11 is, for example, a liquid level sensor, it is possible to measure the distance between the liquid level LS of the cleaning liquid L supplied to the cleaning chamber 2 and the sensor (liquid level detection unit 11). The distance between the liquid level LS and the sensor (liquid level detection unit 11) can be measured at predetermined intervals such as every 0.1 seconds or every 10 seconds. Information (data) regarding the distance to the liquid level measured by the liquid level detection section 11 is once sent to the receiving section 12 by wire or wirelessly, and the measurement results are collected there.

The measured distance information sent to the receiving unit 12 is processed by the calculation unit 13 as a time change (increase amount per unit time) of the collected distance information. The determining unit 14 determines (discriminates) the state of the packaging of the object W to be processed in the cleaning chamber 2 based on the calculation results processed by the calculating unit 13 .

In addition to the liquid level sensor shown in FIG. 1, the liquid level detection unit constituting the package measuring device of the present invention may include sensors using various methods such as infrared rays, ultrasonic waves, LEDs, and lasers, as well as floats and the like. The measurement device used is not limited to these devices as long as it can instantly measure the distance between the liquid level detection section and the liquid surface.

1 Vacuum degreasing cleaning equipment 2 Cleaning chamber 10 Packing form measuring device 11 Liquid level detection unit 12 Receiving unit 13 Computing unit 14 Judgment unit L Cleaning liquid LS Liquid level P1, P2 Piping V Valve W Object to be processed

Claims (2)

a liquid level detection unit that measures a distance to a liquid level in a container in which an object to be processed is installed; a reception unit that collects information regarding the distance measured by the liquid level detection unit; It has a calculation unit that calculates a temporal change in the distance to the liquid level based on the information, and a determination unit that determines the state of the packaging of the object to be processed based on the result of the calculation process performed by the calculation unit. 1. A heat treatment system comprising: a vacuum degreasing cleaning device equipped with a package shape measuring device for a workpiece; and a heat treatment apparatus equipped with an oil bath for quenching the workpiece. The heat treatment system according to claim 1, wherein the liquid level detection unit is a liquid level detection device that detects changes in the liquid level using any one of infrared rays, ultrasonic waves, LEDs, lasers, and floats. .

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